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271,078 Matching Results

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Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
Laser-plasma interaction experiments at laser wavelengths of 1. 064. mu. m, 0. 532. mu. m, and 0. 355. mu. m (open access)

Laser-plasma interaction experiments at laser wavelengths of 1. 064. mu. m, 0. 532. mu. m, and 0. 355. mu. m

The effect of laser wavelength on laser-plasma coupling is one of the critical issues facing the laser driven inertial confinement community. The advantages of using lasers with output wavelength less than 1 ..mu..m, such as enhanced absorption and hydrodynamic efficiency, reduction in parametric instabilities and corresponding suprathermal electron generation, have long been predicted theoretically.
Date: January 1, 1982
Creator: Campbell, E. M.; Mead, W. C. & Turner, R. E.
Object Type: Article
System: The UNT Digital Library
Coordination/management tasks for the IEA and CCMS solar heating and cooling programs (open access)

Coordination/management tasks for the IEA and CCMS solar heating and cooling programs

None
Date: January 1, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
GAS-COOLED REACTOR PROGRAM QUARTERLY PROGRESS REPORT FOR PERIOD ENDING SEPTEMBER 30, 1961 (open access)

GAS-COOLED REACTOR PROGRAM QUARTERLY PROGRESS REPORT FOR PERIOD ENDING SEPTEMBER 30, 1961

Progress is reported on investigations in support of the Experimental Gas-Cooled Reactor, the Pebble-Bed Reactor Experiment, Advanced reactor design and development, test facilities, components, and materials. Topics covered include EGCR physics, EGCR performance analyses, structural investigations, EGCR component and materials development and testing, EGCR experimental facilities, PBRE physics and design studies, fueled-graphite investigations, clad fuel development, design studies of advanced power plants, experimental investigations of heat transfer and fluid flow, development of equipment anmd test facilities. and fabrication studies. (M.C.G.)
Date: February 1, 1962
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Large Radioisotope Heat Source Capsule (LRHSC). Sixth Quarterly Progress Report, October--December 1968. (open access)

Large Radioisotope Heat Source Capsule (LRHSC). Sixth Quarterly Progress Report, October--December 1968.

None
Date: January 1, 1969
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Stark broadening of isolated lines from high-Z emitters in dense plasmas (open access)

Stark broadening of isolated lines from high-Z emitters in dense plasmas

The joint distribution of the electric microfield and its longitudinal derivative is required for the calculation of line profiles for the He-like ions in very dense plasmas. We used a molecular dynamics code to compute exact distributions in single- and multi-component plasmas, and then we investigated various analytical approximations to these results. We found that a simplified, two-nearest-neighbor scheme leads to surprisingly accurate distribution functions. Our results are illustrated by sample profiles for Ne/sup +8/ and Ar/sup +16/ resonance lines.
Date: September 1, 1980
Creator: Weisheit, J.C. & Pollock, E.L.
Object Type: Article
System: The UNT Digital Library
Growth regulation by macrophages (open access)

Growth regulation by macrophages

The evidence reviewed here indicates that macrophages, either acting alone or in concert with other cells, influence the proliferation of multiple types of cells. Most of the data indicate that these effects are mediated by soluble macrophage-elaborated products (probably proteins) although the role of direct cell-to-cell contacts cannot be ruled out in all cases. A degree of success has been achieved on the biochemical characterization of these factors, due mainly to their low specific activity in conditioned medium and the lack of rapid, specific assays. Understanding the growth-regulating potential of macrophages is an important and needed area of research.
Date: January 1, 1982
Creator: Wharton, W.; Walker, E. & Stewart, C.C.
Object Type: Article
System: The UNT Digital Library
Removal of $sup 137$Cs From Alkaline Condensate Wastes (open access)

Removal of $sup 137$Cs From Alkaline Condensate Wastes

None
Date: January 1, 1968
Creator: Mercer, B. W.; Ames, L. L. & Parkhurst, R. G.
Object Type: Report
System: The UNT Digital Library
Diskless LSI-11 systems (open access)

Diskless LSI-11 systems

Programs for dedicated LSI-11 based systems can easily be stored in ROM instead of floppy disks, yet execute the same as disk-stored programs. Two sample systems are described.
Date: January 1, 1982
Creator: Ford, W. & Shirk, D. G.
Object Type: Article
System: The UNT Digital Library
AEC FUELS AND MATERIALS DEVELOPMENT PROGRAM. Seventh Annual Report. (open access)

AEC FUELS AND MATERIALS DEVELOPMENT PROGRAM. Seventh Annual Report.

This report is the seventh annual report of the unclassified portion of the Fuels and Materials Development Programs being conducted by the General Electric Company's Nuclear Materials and Propulsion Operation under Contract AT(40-1)-2847, issued by the Fuels and Materials Branch, Division of Reactor Development and Technology, of the Atomic Energy Commission. This report covers the period from January 31, 1967 to January 31, 1968, and thus also serves as the quarterly progress report for the final quarter of the year.
Date: January 1, 1968
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Ecology of the plankton of the Chesapeake Bay. Progress report, 1 August 1974--31 July 1975. [/sup 14/C and /sup 15/N tracer studies] (open access)

Ecology of the plankton of the Chesapeake Bay. Progress report, 1 August 1974--31 July 1975. [/sup 14/C and /sup 15/N tracer studies]

None
Date: April 1, 1975
Creator: Taylor, W. Rowland & Taft, Jay L.
Object Type: Report
System: The UNT Digital Library
Sintering of polycrystalline ionic conductors:. beta. ''-Al/sub 2/O/sub 3/ and NASICON (open access)

Sintering of polycrystalline ionic conductors:. beta. ''-Al/sub 2/O/sub 3/ and NASICON

The densification kinetics for both ..beta..''-alumina and NASICON are dramatically different. ..beta..''-Alumina sinters by a reactive liquid process whereas NASICON densifies by a solid state method. More importantly, a qualitative examination of particle and agglomerate distributions, phase composition, linear shrinkage analysis, and heating rate effects can result in a concise determination of sintering processes without recourse to more quantitative techniques. Such a simple procedural method should be a basis for any beginning investigative study into the densification mechanism of new multicomponent ceramic materials.
Date: January 1, 1979
Creator: McEntire, B. J.; Miller, G. R. & Gordon, R. S.
Object Type: Article
System: The UNT Digital Library
SURVEY OF REACTOR FACILITIES FOR PRESSURE TUBE IRRADIATION. (open access)

SURVEY OF REACTOR FACILITIES FOR PRESSURE TUBE IRRADIATION.

None
Date: January 1, 1968
Creator: Ard, P. A.; Heck, E. N. & McJilton, C. H.
Object Type: Report
System: The UNT Digital Library
Severe accident core heatup transients in modular high temperature gas-cooled reactors without operating Reactor Cavity Cooling Systems (open access)

Severe accident core heatup transients in modular high temperature gas-cooled reactors without operating Reactor Cavity Cooling Systems

The ultimate decay heat removal system for the current Modular High Temperature Gas-Cooled reactors is a completely passive natural convection air cooling loop. This paper considers an extremely remote accident scenario, where even this passive system fails, and heat rejection is only via a layer of thermal insulation to the reactor silo structure and the surrounding soil. The results show that even in this case the peak fuel temperatures remain well within safe limits. However, vessel and concrete temperatures can - under extreme circumstances and after several weeks - reach temperature levels at which structural failure becomes possible.
Date: January 1, 1988
Creator: Kroeger, P. G.
Object Type: Article
System: The UNT Digital Library
Examination of Uranium-2 w/o Zirconium Experimental Fuel Slugs Irradiated in EBR-I. Final Report-Program 6.1.11 (open access)

Examination of Uranium-2 w/o Zirconium Experimental Fuel Slugs Irradiated in EBR-I. Final Report-Program 6.1.11

Six groups of U-2 wt% Zr fuel slugs were irradiated in the first core of the EBR-I to burnups of 0.080 to 0.189 at.% at calculated temperatures of 307 to 353 deg C. Two groups of cast specimens were found to be more dimensionally stable than four groups of wrought slugs. Of the wrought slungs, the as quenched group showed less tendency to grow than the three groups which had some annealing after quenching. Specimens at burnups of about 0.189 at.% and at 383 deg C showed the onset of swelling as indicated by density measurements. The hardnesses of these specimens seemed but little affected by radiation, but there was an indication of softening with increasing irradiation temperature. (auth)
Date: February 1, 1962
Creator: Murphy, W. F.; Klank, A. C. & Paine, S. H.
Object Type: Report
System: The UNT Digital Library
The microscopic world: A demonstration of electron microscopy for younger students (open access)

The microscopic world: A demonstration of electron microscopy for younger students

None
Date: January 1, 1991
Creator: Horton, L. L.
Object Type: Article
System: The UNT Digital Library
Photoinduced Charge Separation by Polymer-Bound Chromophores (open access)

Photoinduced Charge Separation by Polymer-Bound Chromophores

This project has examined the photodynamic behavior of water-soluble polymers that have covalently linked hydrophobic chromophores spaced along the chains. These polymeric systems have been examined for photoinduced charge separation with electron-accepting ions having different total charge. Focus has been on the excited singlet (S{sub 1}) state formed by laser flash absorption. The effects of pH and ionic strength -- factors that govern the conformational nature of the polymer in solution -- have been studied. A second major effort has been to study photoinduced redox processes involving excited states of water-soluble variants of anthracene and acridine. 27 refs., 16 figs., 2 tabs.
Date: September 1, 1991
Creator: Rodgers, M. A. J.
Object Type: Report
System: The UNT Digital Library
Structural analysis of the West Hackbery No. 6 SPR storage cavern (open access)

Structural analysis of the West Hackbery No. 6 SPR storage cavern

Four separate structural analyses of the West Hackberry No. 6 SPR storage cavern are presented. One analysis covers the creep response of the cavern beginning shortly before the time when an accidental fire occurred and proceeding through the cavern recertification pressure test. The second analysis models the surface uplife that is expected during the same pressure test. The third and fourth numerical studies investigate the structural response of West Hackberry No. 6 to slabbing and a rapid pressure drop. All analyses indicate that this cavern should be structurally stable for the conditions assumed.
Date: August 1, 1980
Creator: Benzley, S.E.
Object Type: Report
System: The UNT Digital Library
Pot Calcination Performance During First Radioactive Tests in Waste Solidification Engineering Prototypes: Waste Solidification Program. Vol. 4. (open access)

Pot Calcination Performance During First Radioactive Tests in Waste Solidification Engineering Prototypes: Waste Solidification Program. Vol. 4.

None
Date: January 1, 1968
Creator: McElroy, J. L.; Cooley, C. R.; DeMier, W. V.; Mendel, J. E.; Suddath, J. C. & Blomeke, J. O.
Object Type: Report
System: The UNT Digital Library
Numerical study of the NOL large-scale gap test (open access)

Numerical study of the NOL large-scale gap test

The NOL large-scale gap test has been modeled numerically using the LASL reactive hydrodynamics code 2DE with Forest Fire burn rates. The model gives good agreement between calculated and experimental critical gap values for VTQ-2 and Composition B. The calibration of peak pressure in the gap versus gap length has been obtained from these calculations, and is in good agreement with the published experimental curve. The two-dimensional nature of the gap test is evident from the curvature of the shock wave in the gap and test sample, and from the observed distance of run to detonation in the test samples.
Date: January 1, 1980
Creator: Bowman, A.L.
Object Type: Report
System: The UNT Digital Library
Compilation of cores and cuttings from U. S. Government-sponsored geothermal wells (open access)

Compilation of cores and cuttings from U. S. Government-sponsored geothermal wells

This compendium lists the repositories holding geothermal core and well cuttings from US government-sponsored geothermal wells. Also, a partial listing of cores and cutting from these wells is tabulated, along with referenced reports and location maps. These samples are available to the public for research investigations and studies, usually following submission of an appropriate request for use of the samples. The purpose of this compilation is to serve as a possible source of cores and cuttings that might aid in enhancing rock property studies in support of geothermal log interpretation.
Date: July 1, 1980
Creator: Mathews, M.; Gambill, D.T. & Rowley, J.C.
Object Type: Report
System: The UNT Digital Library
Surprising patterns of CMOS susceptibility to ESD and implications on long-term reliability (open access)

Surprising patterns of CMOS susceptibility to ESD and implications on long-term reliability

CMOS electrostatic discharge (ESD) failures in a product where, by design, the device input terminals are not accessible to ESD led to this study of device susceptibility and an analysis of the long-term reliability of devices in assemblies from that production line. Some surprising patterns of device susceptibility are established and it is shown that the probability of long-term failure in devices whose electrical characteristics have been degraded by electrostatic discharge is small.
Date: January 1, 1980
Creator: Schwank, J.R.; Baker, R.P. & Armendariz, M.G.
Object Type: Article
System: The UNT Digital Library
Alkali sorber (RABSAM), September 1, 1990--August 30, 1991 (open access)

Alkali sorber (RABSAM), September 1, 1990--August 30, 1991

The objective of this work is to develop a regenerable activated-bauxite sorber alkali monitor that requires no high-temperature/high-pressure sampling line for the reliable in situ measurement of alkali-vapor concentration in the exhaust from the pressurized fluidized-bed combustion of coal. 11 refs., 2 figs., 1 tab.
Date: January 1, 1991
Creator: Lee, S. H. D. & Swift, M. W.
Object Type: Article
System: The UNT Digital Library
Interactions of tailings leachate with local liner materials found at Canonsburg, Pennsylvania. (open access)

Interactions of tailings leachate with local liner materials found at Canonsburg, Pennsylvania.

The mill tailings site at Canonsburg, Pennsylvania is the first mill site to receive remedial action under the Department of Energy's Uranium Mill Tailings Remedial Action Program. Part of this remedial action will require excavating the 53,500 m/sup 3/ (70,000 yd/sup 3/) of tailings on the site having a specific activity exceeding 100 pCi/g, and encapsulating these contaminated tailings in a clay-lined cell. As part of the remedial action effort, Pacific Northwest Laboratory has been studying the interactions of tailings and tailings leachate with locally occurring clays proposed for liner materials. These studies include physical and chemical characterization of amended and unamended local clays, chemical characterization of the tailings, column studies of tailings leached with deionized water, and column studies of clays contacted with tailings solutions to determine the attenuation properties of the proposed liner materials. Column studies of tailings leached with deionized water indicated that the Canonsburg tailings could represent a source of soluble radium-226 and uranium-238, several trace metals, cations, and the anions SO/sub 4/, NO/sub 3/, and Cl. Of these soluble contaminants, uranium-238, radium-226, the trace metals As and Mo, and the anions F and SO/sub 4/ were present at levels exceeding maximum concentration levels in the …
Date: April 1, 1984
Creator: Dodson, M.E.; Gee, G.W. & Serne, R.J.
Object Type: Report
System: The UNT Digital Library
Resource capture by single leaves (open access)

Resource capture by single leaves

Leaves show a variety of strategies for maximizing CO{sub 2} and light capture. These are more meaningfully explained if they are considered in the context of maximizing capture relative to the utilization of water, nutrients and carbohydrates reserves. There is considerable variation between crops in their efficiency of CO{sub 2} and light capture at the leaf level. Understanding of these mechanisms indicate some ways in which efficiency of resource capture could be level cannot be meaningfully considered without simultaneous understanding of implications at the canopy level. 36 refs., 5 figs., 1 tab.
Date: May 1, 1992
Creator: Long, S.P.
Object Type: Article
System: The UNT Digital Library